derek.holloway
7502bf64a4
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85 lines
2.6 KiB
LLVM
85 lines
2.6 KiB
LLVM
; RUN: llc < %s -mtriple=avr -mattr=avr6 | FileCheck %s
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declare i16 @allocate(ptr, ptr)
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; Test taking an address of an alloca with a small offset (adiw)
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define i16 @alloca_addressof_small() {
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entry:
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; CHECK-LABEL: alloca_addressof_small:
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; Test that Y is saved
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; CHECK: push r28
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; CHECK: push r29
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; CHECK: movw r24, r28
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; CHECK: adiw r24, 17
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; CHECK: movw {{.*}}, r28
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; CHECK: adiw {{.*}}, 39
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; CHECK: movw r22, {{.*}}
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; CHECK: pop r29
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; CHECK: pop r28
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%p = alloca [18 x i16]
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%k = alloca [14 x i16]
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%arrayidx = getelementptr inbounds [14 x i16], ptr %k, i16 0, i16 8
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%arrayidx1 = getelementptr inbounds [18 x i16], ptr %p, i16 0, i16 5
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%call = call i16 @allocate(ptr %arrayidx, ptr %arrayidx1)
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ret i16 %call
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}
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; Test taking an address of an alloca with a big offset (subi/sbci pair)
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define i16 @alloca_addressof_big() {
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entry:
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; CHECK-LABEL: alloca_addressof_big:
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; CHECK: movw r24, r28
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; CHECK: adiw r24, 17
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; CHECK: movw r22, r28
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; CHECK: subi r22, 145
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; CHECK: sbci r23, 255
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%p = alloca [55 x i16]
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%k = alloca [14 x i16]
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%arrayidx = getelementptr inbounds [14 x i16], ptr %k, i16 0, i16 8
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%arrayidx1 = getelementptr inbounds [55 x i16], ptr %p, i16 0, i16 41
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%call = call i16 @allocate(ptr %arrayidx, ptr %arrayidx1)
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ret i16 %call
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}
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; Test writing to an allocated variable with a small and a big offset
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define i16 @alloca_write(i16 %x) {
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entry:
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; CHECK-LABEL: alloca_write:
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; Small offset here
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; CHECK: std Y+24, {{.*}}
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; CHECK: std Y+23, {{.*}}
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; Big offset here
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; CHECK: adiw r28, 57
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; CHECK: std Y+63, {{.*}}
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; CHECK: std Y+62, {{.*}}
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; CHECK: sbiw r28, 57
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%p = alloca [15 x i16]
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%k = alloca [14 x i16]
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%arrayidx = getelementptr inbounds [15 x i16], ptr %p, i16 0, i16 45
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store i16 22, ptr %arrayidx
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%arrayidx1 = getelementptr inbounds [14 x i16], ptr %k, i16 0, i16 11
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store i16 42, ptr %arrayidx1
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%arrayidx2 = getelementptr inbounds [14 x i16], ptr %k, i16 0, i16 0
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%arrayidx3 = getelementptr inbounds [15 x i16], ptr %p, i16 0, i16 0
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%call = call i16 @allocate(ptr %arrayidx2, ptr %arrayidx3)
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ret i16 %call
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}
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; Test writing to an allocated variable with a huge offset that cant be
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; materialized with adiw/sbiw but with a subi/sbci pair.
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define void @alloca_write_huge() {
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; CHECK-LABEL: alloca_write_huge:
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; CHECK: subi r28, 41
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; CHECK: sbci r29, 255
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; CHECK: std Y+63, {{.*}}
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; CHECK: std Y+62, {{.*}}
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; CHECK: subi r28, 215
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; CHECK: sbci r29, 0
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%k = alloca [140 x i16]
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%arrayidx = getelementptr inbounds [140 x i16], ptr %k, i16 0, i16 138
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store i16 22, ptr %arrayidx
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%arraydecay = getelementptr inbounds [140 x i16], ptr %k, i16 0, i16 0
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call i16 @allocate(ptr %arraydecay, ptr null)
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ret void
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}
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